Pro Tools is my first choice with Logic Pro X being second. Of course the computer, type of interface, monitors, etc. are all important to creating the sound you want. For mastering, I've found Izotope Ozone to be the easiest to quickly dial in a very nice sound for a variety of genres of music and Waves plug-ins for fine tuning as well. All that being said, at the end of the day, the software and equipment is only as good as the creativity and talent of the actual person producing.